filename    = 'text_files\\use_py_write.txt'
source_file = 'text_files\\learning_python.txt'
with open(source_file) as source_file_obj:
    source_file_cont = str(source_file_obj.readlines())
with open(filename,'w') as target_file_object:
    target_file_object.write(source_file_cont)
    target_file_object.write("Hello monkey!\n")
    target_file_object.write("\n\n\t\tGO TO THE .....")
with open(filename,'a') as add_file_object:
    add_file_object.write("I love C language!\n")
    add_file_object.write("I like C++ language")
